package main

import (
	"fmt"
	"time"
)

func main() {
	messageCh := make(chan string, 1) // Buffered channel to allow a send without immediate receiver

	// Goroutine that might send a message after a delay
	go func() {
		time.Sleep(time.Second * 1)
		fmt.Println("Sender: Sending 'Hello!'")
		messageCh <- "Hello!"
		fmt.Println("Sender: Sent 'Hello!'")
	}()

	fmt.Println("Main: Attempting non-blocking read...")

	// Perform a non-blocking read
	select {
	case msg := <-messageCh:
		fmt.Printf("Main: Received message: '%s'
", msg)
	default:
		fmt.Println("Main: No message available, performing other work.")
		// Simulate other work
		time.Sleep(time.Millisecond * 500)
		fmt.Println("Main: Finished other work.")
	}

	fmt.Println("Main: First non-blocking read attempt complete.")

	// Wait a bit to ensure the message is sent if it wasn't there before
	time.Sleep(time.Second * 1)

	fmt.Println("Main: Attempting non-blocking read again (message might be there now)...")
	select {
	case msg := <-messageCh:
		fmt.Printf("Main: Received message: '%s'
", msg)
	default:
		fmt.Println("Main: Still no message available.")
	}

	fmt.Println("Main: Program finished.")
}